Physics Past Questions and Answers

The volume and pressure of a given mass of gas at 27^oC are 76cm³ and 80cm of mercury respectively. Calculate the volume at s.t.p

A piece of metal of mass 50g is cooled from 80^oC to 20^oC. Calculate the amount of heat lost. (specific heat capacity of the material of metal = 450Jkg^-1K^-1)

The mass of water vapour in a given volume of air is 0.05g at 20^oC, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air

The temperature at which the saturated vapour pressure of a liquid is equal to the external atmospheric pressure is known as its

A periodic pulse travels a distance of 20.0m in 1.00s. If its frequency is 2.0 x 10³Hz. Calculate the wavelength.